EGR/AIR Block Off plates, what do they do?
#1
EGR/AIR Block Off plates, what do they do?
im curious as to what these block of plates too, im thinking about getting them, just wanna make sure its okay. I dont have emissions or anything either. will i see any better performance out of the motor?
#3
To answer the OP's question, the block off plates block off the EGR port on the intake manifold and the AIR ports on the exhaust manifolds so that the manifolds don't leak after the AIR/ EGR systems have been removed on a stock car. Most people who go with headers and an aftermarket manifold don't need block off plates because a lot of aftermarket manifolds can be ordered without the ports for EGR/ AIR.
#4
I would tend to disagree with that statement. The egr returns unburned fuel vapors back into the intake. Because of this, it also returns some of the exhaust gases as well. By blocking the egr, you are not allowing the unburned mixture to return, and relying more on the fresh air from the front of the intake. Cleaner air= better combustion= better performance= hp.
I do agree that removing it does remove weight, and helps clean up the engine compartment though. Also, taking the egr might lead to worse mileage... But mpg isn't the biggest concern for quit a few of us. Lol
I do agree that removing it does remove weight, and helps clean up the engine compartment though. Also, taking the egr might lead to worse mileage... But mpg isn't the biggest concern for quit a few of us. Lol
#6
#7
Thanks mattyfreshsodef... lol! Didn't know about being able to plug this guy off on my LS1 intake and bought another intake local on CL. Not complaining though... found an LS6 intake w/ rails and injectors for $75... no hole. Score!
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#9
haha no prob man, sweet score on the intake!
#11
The AIR system puts fresh air into the cats to help them hit light off temp faster lowering cold start up emissions. Without cats, it's useless.
And no, the EGR system does not rob any horsepower to a noticable degree. The only issue is the tube sticking down in the air stream. Other than that, it will not rob any power by changing the mixture in the combustion process. Period.
And no, the EGR system does not rob any horsepower to a noticable degree. The only issue is the tube sticking down in the air stream. Other than that, it will not rob any power by changing the mixture in the combustion process. Period.
#12
And no, the EGR system does not rob any horsepower to a noticable degree. The only issue is the tube sticking down in the air stream. Other than that, it will not rob any power by changing the mixture in the combustion process. Period.
#13
So putting old exhaust air back into your motor does not harm performance, is that why slp pumps fresh air from the outside atmosphere into every test dyno they run. And yes no reason to have AIR or cats or EGR of you want the most from your engine, in my opinion.
#15
Common sense will tell you clean air is better than dirty, however, it just doesn't translate into real hp gains in this case.
#18
If you want to save the $15, you can cut the flanges off of the existing EGR tubes and use some aluminum foil as a gasket to cover the open hole. Just make it fairly thick. I actually used a penny with the foil.
#19
Thanks for the correction.
#20
EGR is only active during part throttle, low rpm, low engine load cruising conditions. Unless your worried about every horsepower driving down the interstate in 6th gear at 70 mph, it's a moot point.